V-BOB. — A half beam of the form of a letter V. It is placed horizontally in a chamber made for the purpose in a pumping shaft. Its main gudgeon is placed at the point of the V, and inner end of the chamber, and works in a fixed carriage. The other end of the V-bob projects into the pit, from the gudgeon at the lower end of which the spears are hung. The gudgeon in the upper limb, which is a little shorter, is connected by a spear passing through a diagonal staple under the main engine-house, with a gudgeon in the main beam, at a point between the cylinder and the main beatn pillar. This arrangement is not adopted in modern practice.

VIEWER. — The manager of a colliery; one who has the charge of all underground, and generally of all surface, arrangements.